Minimize python 3rdparty deps.
Minimize python 3rdparty deps.

(sapling split of 139c70e99ce2422abab763401acccc48df8beb6f)
pantsbuild/pants,dgomez10/xanon,mateor/pants,gmalmquist/pants,kwlzn/pants,mateor/pants,lahosken/pants,gmalmquist/pants,cevaris/pants,peiyuwang/pants,foursquare/pants,wisechengyi/pants,foursquare/pants,benjyw/pants,megaserg/pants,sameerparekh/pants,gmalmquist/pants,scode/pants,foursquare/pants,scode/pants,lahosken/pants,mateor/pants,dgomez10/xanon,di0spyr0s/pants,scode/pants,megaserg/pants,pgroudas/pants,sid-kap/pants,areitz/pants,foursquare/pants,tdyas/pants,pombredanne/pants,square/pants,sameerparekh/pants,fkorotkov/pants,kwlzn/pants,ericzundel/pants,fkorotkov/pants,sid-kap/pants,digwanderlust/pants,dturner-tw/pants,sameerparekh/pants,jsirois/pants,ity/pants,areitz/pants,baroquebobcat/pants,ericzundel/pants,jtrobec/pants,sid-kap/pants,jtrobec/pants,baroquebobcat/pants,kwlzn/pants,pantsbuild/pants,benjyw/pants,laurentgo/pants,benjyw/pants,dgomez10/xanon,kslundberg/pants,dbentley/pants,tejal29/pants,15Dkatz/pants,dbentley/pants,lahosken/pants,peiyuwang/pants,sid-kap/pants,fkorotkov/pants,di0spyr0s/pants,baroquebobcat/pants,TansyArron/pants,TansyArron/pants,lahosken/pants,digwanderlust/pants,manasapte/pants,areitz/pants,lahosken/pants,wisechengyi/pants,sameerparekh/pants,scode/pants,dbentley/pants,qma/pants,gmalmquist/pants,baroquebobcat/pants,pgroudas/pants,kslundberg/pants,kwlzn/pants,digwanderlust/pants,UnrememberMe/pants,square/pants,jessrosenfield/pants,qma/pants,landism/pants,TansyArron/pants,kwlzn/pants,sid-kap/pants,pombredanne/pants,tejal29/pants,tdyas/pants,jtrobec/pants,ity/pants,jsirois/pants,laurentgo/pants,manasapte/pants,tdyas/pants,dbentley/pants,laurentgo/pants,landism/pants,jtrobec/pants,manasapte/pants,wisechengyi/pants,wisechengyi/pants,twitter/pants,Gabriel439/pants,scode/pants,UnrememberMe/pants,dgomez10/xanon,digwanderlust/pants,baroquebobcat/pants,scode/pants,laurentgo/pants,landism/pants,15Dkatz/pants,UnrememberMe/pants,fkorotkov/pants,dgomez10/xanon,di0spyr0s/pants,dturner-tw/pants,peiyuwang/pants,twitter/pants,digwanderlust/pants,dgomez10/xanon,tejal29/pants,jessrosenfield/pants,wisechengyi/pants,tdyas/pants,benjyw/pants,wisechengyi/pants,mateor/pants,foursquare/pants,dgomez10/xanon,di0spyr0s/pants,manasapte/pants,pantsbuild/pants,ericzundel/pants,dgomez10/xanon,tejal29/pants,jessrosenfield/pants,areitz/pants,15Dkatz/pants,TansyArron/pants,slyphon/pants,Gabriel439/pants,UnrememberMe/pants,kwlzn/pants,pombredanne/pants,mateor/pants,wisechengyi/pants,jtrobec/pants,fkorotkov/pants,tdyas/pants,pgroudas/pants,landism/pants,twitter/pants,ericzundel/pants,pantsbuild/pants,foursquare/pants,TansyArron/pants,foursquare/pants,gmalmquist/pants,jtrobec/pants,benjyw/pants,landism/pants,Gabriel439/pants,manasapte/pants,fkorotkov/pants,twitter/pants,twitter/pants,ity/pants,megaserg/pants,ericzundel/pants,fkorotkov/pants,pgroudas/pants,areitz/pants,ity/pants,kslundberg/pants,ericzundel/pants,megaserg/pants,peiyuwang/pants,TansyArron/pants,15Dkatz/pants,twitter/pants,kwlzn/pants,megaserg/pants,pantsbuild/pants,jtrobec/pants,foursquare/pants,slyphon/pants,peiyuwang/pants,square/pants,sid-kap/pants,foursquare/pants,baroquebobcat/pants,tdyas/pants,pgroudas/pants,pantsbuild/pants,mateor/pants,dbentley/pants,UnrememberMe/pants,TansyArron/pants,baroquebobcat/pants,megaserg/pants,dturner-tw/pants,cevaris/pants,baroquebobcat/pants,ity/pants,ity/pants,laurentgo/pants,twitter/pants,benjyw/pants,tejal29/pants,cevaris/pants,mateor/pants,qma/pants,slyphon/pants,pombredanne/pants,sid-kap/pants,Gabriel439/pants,lahosken/pants,15Dkatz/pants,di0spyr0s/pants,qma/pants,dturner-tw/pants,15Dkatz/pants,dbentley/pants,megaserg/pants,Gabriel439/pants,pombredanne/pants,UnrememberMe/pants,dgomez10/xanon,areitz/pants,qma/pants,ity/pants,kslundberg/pants,ericzundel/pants,di0spyr0s/pants,square/pants,gmalmquist/pants,manasapte/pants,slyphon/pants,tdyas/pants,Gabriel439/pants,slyphon/pants,sameerparekh/pants,sameerparekh/pants,twitter/pants,ericzundel/pants,peiyuwang/pants,cevaris/pants,sameerparekh/pants,twitter/pants,jessrosenfield/pants,digwanderlust/pants,kslundberg/pants,pantsbuild/pants,tdyas/pants,slyphon/pants,tdyas/pants,dgomez10/xanon,peiyuwang/pants,qma/pants,jsirois/pants,cevaris/pants,dbentley/pants,pombredanne/pants,dturner-tw/pants,landism/pants,jessrosenfield/pants,UnrememberMe/pants,landism/pants,UnrememberMe/pants,fkorotkov/pants,wisechengyi/pants,di0spyr0s/pants,Gabriel439/pants,lahosken/pants,dgomez10/xanon,baroquebobcat/pants,jessrosenfield/pants,mateor/pants,benjyw/pants,lahosken/pants,dturner-tw/pants,landism/pants,kslundberg/pants,scode/pants,peiyuwang/pants,kslundberg/pants,UnrememberMe/pants,laurentgo/pants,dturner-tw/pants,pombredanne/pants,15Dkatz/pants,areitz/pants,15Dkatz/pants,manasapte/pants,jessrosenfield/pants,cevaris/pants,wisechengyi/pants,gmalmquist/pants,pgroudas/pants,qma/pants,cevaris/pants,slyphon/pants